2020-08-13 00:31:22 +00:00
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/*
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2024-03-25 23:04:26 +00:00
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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2020-08-13 00:31:22 +00:00
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "gtp-path.h"
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#include "pfcp-path.h"
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#include "s5c-handler.h"
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2020-11-07 22:27:12 +00:00
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static void bearer_timeout(ogs_gtp_xact_t *xact, void *data)
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2020-08-13 00:31:22 +00:00
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{
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2020-11-07 22:27:12 +00:00
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sgwc_bearer_t *bearer = data;
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sgwc_sess_t *sess = NULL;
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2020-08-13 00:31:22 +00:00
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sgwc_ue_t *sgwc_ue = NULL;
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uint8_t type = 0;
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ogs_assert(xact);
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2020-11-07 22:27:12 +00:00
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ogs_assert(bearer);
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sess = bearer->sess;
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2020-08-13 00:31:22 +00:00
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ogs_assert(sess);
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sgwc_ue = sess->sgwc_ue;
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ogs_assert(sgwc_ue);
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type = xact->seq[0].type;
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2020-11-07 22:27:12 +00:00
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switch (type) {
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2022-04-12 22:07:39 +00:00
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case OGS_GTP2_UPDATE_BEARER_REQUEST_TYPE:
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2020-11-07 22:27:12 +00:00
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ogs_error("[%s] No Update Bearer Response", sgwc_ue->imsi_bcd);
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break;
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2022-04-12 22:07:39 +00:00
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case OGS_GTP2_DELETE_BEARER_REQUEST_TYPE:
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2020-11-07 22:27:12 +00:00
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ogs_error("[%s] No Delete Bearer Response", sgwc_ue->imsi_bcd);
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2021-01-08 20:09:02 +00:00
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if (!sgwc_bearer_cycle(bearer)) {
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2022-04-29 12:28:16 +00:00
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ogs_error("[%s] Bearer has already been removed",
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sgwc_ue->imsi_bcd);
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2021-01-08 20:09:02 +00:00
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break;
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}
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2021-05-16 03:22:10 +00:00
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ogs_assert(OGS_OK ==
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sgwc_pfcp_send_bearer_modification_request(
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bearer, NULL, NULL, OGS_PFCP_MODIFY_REMOVE));
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2020-11-07 22:27:12 +00:00
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break;
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default:
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ogs_error("GTP Timeout : IMSI[%s] Message-Type[%d]",
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sgwc_ue->imsi_bcd, type);
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}
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2020-08-13 00:31:22 +00:00
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}
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void sgwc_s5c_handle_create_session_response(
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sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
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2022-04-12 22:07:39 +00:00
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ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
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2020-08-13 00:31:22 +00:00
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{
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2022-05-12 13:52:36 +00:00
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int rv, i;
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2022-12-02 00:10:49 +00:00
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uint8_t cause_value = OGS_GTP2_CAUSE_UNDEFINED_VALUE;
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uint8_t session_cause = OGS_GTP2_CAUSE_UNDEFINED_VALUE;
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uint8_t bearer_cause = OGS_GTP2_CAUSE_UNDEFINED_VALUE;
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2020-08-13 00:31:22 +00:00
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sgwc_ue_t *sgwc_ue = NULL;
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sgwc_bearer_t *bearer = NULL;
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sgwc_tunnel_t *ul_tunnel = NULL;
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ogs_pfcp_far_t *far = NULL;
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2022-04-12 22:07:39 +00:00
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ogs_gtp2_f_teid_t *pgw_s5c_teid = NULL;
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ogs_gtp2_f_teid_t *pgw_s5u_teid = NULL;
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2020-08-13 00:31:22 +00:00
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2022-04-12 22:07:39 +00:00
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ogs_gtp2_create_session_response_t *rsp = NULL;
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2020-08-13 00:31:22 +00:00
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ogs_gtp_xact_t *s11_xact = NULL;
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2022-05-28 08:06:36 +00:00
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ogs_gtp_node_t *pgw = NULL;
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2020-08-13 00:31:22 +00:00
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ogs_assert(gtpbuf);
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ogs_assert(message);
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rsp = &message->create_session_response;
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ogs_assert(rsp);
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ogs_debug("Create Session Response");
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2022-04-29 12:28:16 +00:00
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/********************
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* Check Transaction
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********************/
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ogs_assert(s5c_xact);
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s11_xact = s5c_xact->assoc_xact;
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ogs_assert(s11_xact);
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rv = ogs_gtp_xact_commit(s5c_xact);
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ogs_expect(rv == OGS_OK);
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2022-12-02 00:10:49 +00:00
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/************************
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* Getting Cause Value
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************************/
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if (rsp->cause.presence && rsp->cause.data) {
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ogs_gtp2_cause_t *cause = rsp->cause.data;
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ogs_assert(cause);
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session_cause = cause->value;
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}
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2022-09-25 09:55:04 +00:00
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/************************
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* Check Session Context
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*
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* - Session could be deleted before a message is received from SMF.
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************************/
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cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
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if (!sess) {
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2022-12-02 00:10:49 +00:00
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ogs_error("No Context in TEID [Cause:%d]", session_cause);
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2022-09-25 09:55:04 +00:00
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cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
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} else {
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sgwc_ue = sess->sgwc_ue;
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ogs_assert(sgwc_ue);
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}
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if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
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2024-03-25 23:04:26 +00:00
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ogs_gtp_send_error_message(
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s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
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2022-09-25 09:55:04 +00:00
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OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
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return;
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}
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2022-04-29 12:28:16 +00:00
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/*****************************************
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* Check Mandatory/Conditional IE Missing
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*****************************************/
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2022-09-25 09:55:04 +00:00
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ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
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2022-03-05 02:27:22 +00:00
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if (rsp->pgw_s5_s8__s2a_s2b_f_teid_for_pmip_based_interface_or_for_gtp_based_control_plane_interface.presence == 0) {
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2022-12-02 00:10:49 +00:00
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ogs_error("No GTP TEID [Cause:%d]", session_cause);
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2022-04-14 08:34:55 +00:00
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cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
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2020-08-13 00:31:22 +00:00
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}
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2020-09-11 01:50:20 +00:00
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if (rsp->pdn_address_allocation.presence) {
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ogs_paa_t paa;
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memcpy(&paa, rsp->pdn_address_allocation.data,
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ogs_min(sizeof(paa), rsp->pdn_address_allocation.len));
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2022-04-29 12:28:16 +00:00
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if (!OGS_PDU_SESSION_TYPE_IS_VALID(paa.session_type)) {
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2022-12-02 00:10:49 +00:00
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ogs_error("Unknown PDN Type %u, Cause:%d",
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paa.session_type, session_cause);
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2022-04-29 12:28:16 +00:00
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cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_INCORRECT;
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2020-09-11 01:50:20 +00:00
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}
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} else {
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2022-12-02 00:10:49 +00:00
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ogs_error("No PDN Address Allocation [Cause:%d]", session_cause);
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2022-04-14 08:34:55 +00:00
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cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
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2020-09-11 01:50:20 +00:00
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}
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2022-04-29 12:28:16 +00:00
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if (rsp->cause.presence == 0) {
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2022-12-02 00:10:49 +00:00
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ogs_error("No Cause [VALUE:%d]", session_cause);
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2022-05-12 13:52:36 +00:00
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cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
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2022-04-29 12:28:16 +00:00
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}
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2022-04-12 22:07:39 +00:00
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if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
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2024-03-25 23:04:26 +00:00
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ogs_gtp_send_error_message(
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s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
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2022-04-12 22:07:39 +00:00
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OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
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2022-03-05 02:27:22 +00:00
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return;
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2020-11-07 22:27:12 +00:00
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}
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2022-04-29 12:28:16 +00:00
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/********************
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2022-03-05 02:27:22 +00:00
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* Check Cause Value
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2022-04-29 12:28:16 +00:00
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********************/
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2022-04-12 22:07:39 +00:00
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ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
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2020-11-07 22:27:12 +00:00
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2022-05-12 13:52:36 +00:00
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for (i = 0; i < OGS_BEARER_PER_UE; i++) {
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2022-12-02 00:10:49 +00:00
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ogs_gtp2_cause_t *cause = NULL;
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2022-05-12 13:52:36 +00:00
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if (rsp->bearer_contexts_created[i].cause.presence == 0) {
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break;
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}
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cause = rsp->bearer_contexts_created[i].cause.data;
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2022-12-02 00:10:49 +00:00
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if (cause == NULL) {
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ogs_error("No Cause Data");
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continue;
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}
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bearer_cause = cause->value;
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if (bearer_cause != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
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ogs_error("GTP Bearer Cause [VALUE:%d]", bearer_cause);
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2024-03-25 23:04:26 +00:00
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ogs_gtp_send_error_message(
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s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
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2022-12-02 00:10:49 +00:00
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OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, bearer_cause);
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2022-05-12 13:52:36 +00:00
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return;
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}
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2020-11-07 22:27:12 +00:00
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}
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2022-12-02 00:10:49 +00:00
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if (session_cause != OGS_GTP2_CAUSE_REQUEST_ACCEPTED &&
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session_cause != OGS_GTP2_CAUSE_REQUEST_ACCEPTED_PARTIALLY &&
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session_cause !=
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2022-04-12 22:07:39 +00:00
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OGS_GTP2_CAUSE_NEW_PDN_TYPE_DUE_TO_NETWORK_PREFERENCE &&
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2022-12-02 00:10:49 +00:00
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session_cause !=
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2022-04-12 22:07:39 +00:00
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OGS_GTP2_CAUSE_NEW_PDN_TYPE_DUE_TO_SINGLE_ADDRESS_BEARER_ONLY) {
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2022-12-02 00:10:49 +00:00
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ogs_error("GTP Cause [VALUE:%d]", session_cause);
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2024-03-25 23:04:26 +00:00
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ogs_gtp_send_error_message(
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s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
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2022-12-02 00:10:49 +00:00
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OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, session_cause);
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2020-08-13 00:31:22 +00:00
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return;
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}
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2022-04-29 12:28:16 +00:00
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/********************
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* Check ALL Context
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********************/
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ogs_assert(sgwc_ue);
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ogs_assert(sess);
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2020-11-07 22:27:12 +00:00
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2022-05-12 13:52:36 +00:00
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ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
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sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
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ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
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sess->sgw_s5c_teid, sess->pgw_s5c_teid);
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2020-08-13 00:31:22 +00:00
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2022-05-12 13:52:36 +00:00
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for (i = 0; i < OGS_BEARER_PER_UE; i++) {
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if (rsp->bearer_contexts_created[i].presence == 0) {
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break;
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}
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if (rsp->bearer_contexts_created[i].eps_bearer_id.presence == 0) {
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ogs_error("No EPS Bearer ID");
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break;
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}
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if (rsp->bearer_contexts_created[i].s5_s8_u_sgw_f_teid.presence == 0) {
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ogs_error("No GTP TEID");
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break;
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}
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2020-08-13 00:31:22 +00:00
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2022-05-12 13:52:36 +00:00
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/* EPS Bearer ID */
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bearer = sgwc_bearer_find_by_sess_ebi(sess,
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rsp->bearer_contexts_created[i].eps_bearer_id.u8);
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if (!bearer) {
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2024-03-25 23:04:26 +00:00
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ogs_gtp_send_error_message(
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s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
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2022-05-12 13:52:36 +00:00
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OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE,
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OGS_GTP2_CAUSE_MANDATORY_IE_MISSING);
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return;
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}
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2020-08-13 00:31:22 +00:00
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2022-05-12 13:52:36 +00:00
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ul_tunnel = sgwc_ul_tunnel_in_bearer(bearer);
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ogs_assert(ul_tunnel);
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2020-12-03 06:16:57 +00:00
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2022-05-12 13:52:36 +00:00
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ogs_debug(" SGW_S5U_TEID[%d] PGW_S5U_TEID[%d]",
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ul_tunnel->local_teid, ul_tunnel->remote_teid);
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/* Receive Data Plane(UL) : PGW-S5U */
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pgw_s5u_teid = rsp->bearer_contexts_created[i].s5_s8_u_sgw_f_teid.data;
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ogs_assert(pgw_s5u_teid);
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ul_tunnel->remote_teid = be32toh(pgw_s5u_teid->teid);
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rv = ogs_gtp2_f_teid_to_ip(pgw_s5u_teid, &ul_tunnel->remote_ip);
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if (rv != OGS_OK) {
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2024-03-25 23:04:26 +00:00
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ogs_gtp_send_error_message(
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s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
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2022-05-12 13:52:36 +00:00
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OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE,
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OGS_GTP2_CAUSE_MANDATORY_IE_MISSING);
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return;
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}
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far = ul_tunnel->far;
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ogs_assert(far);
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far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
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|
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
ogs_pfcp_ip_to_outer_header_creation(&ul_tunnel->remote_ip,
|
|
|
|
&far->outer_header_creation, &far->outer_header_creation_len));
|
|
|
|
far->outer_header_creation.teid = ul_tunnel->remote_teid;
|
|
|
|
}
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
/* Receive Control Plane(UL) : PGW-S5C */
|
|
|
|
pgw_s5c_teid = rsp->pgw_s5_s8__s2a_s2b_f_teid_for_pmip_based_interface_or_for_gtp_based_control_plane_interface.data;
|
|
|
|
ogs_assert(pgw_s5c_teid);
|
|
|
|
sess->pgw_s5c_teid = be32toh(pgw_s5c_teid->teid);
|
|
|
|
|
2022-05-28 08:06:36 +00:00
|
|
|
pgw = ogs_gtp_node_find_by_f_teid(&sgwc_self()->pgw_s5c_list, pgw_s5c_teid);
|
|
|
|
if (!pgw) {
|
|
|
|
pgw = ogs_gtp_node_add_by_f_teid(
|
|
|
|
&sgwc_self()->pgw_s5c_list,
|
|
|
|
pgw_s5c_teid, ogs_gtp_self()->gtpc_port);
|
|
|
|
ogs_assert(pgw);
|
|
|
|
|
|
|
|
rv = ogs_gtp_connect(
|
|
|
|
ogs_gtp_self()->gtpc_sock, ogs_gtp_self()->gtpc_sock6, pgw);
|
|
|
|
ogs_assert(rv == OGS_OK);
|
|
|
|
}
|
|
|
|
/* Setup GTP Node */
|
|
|
|
OGS_SETUP_GTP_NODE(sess, pgw);
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
2022-05-12 13:52:36 +00:00
|
|
|
sgwc_pfcp_send_session_modification_request(
|
|
|
|
sess, s11_xact, gtpbuf,
|
2021-05-16 03:22:10 +00:00
|
|
|
OGS_PFCP_MODIFY_UL_ONLY|OGS_PFCP_MODIFY_ACTIVATE));
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
|
2022-07-16 04:27:18 +00:00
|
|
|
void sgwc_s5c_handle_modify_bearer_response(
|
2020-08-13 00:31:22 +00:00
|
|
|
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
|
2020-08-13 00:31:22 +00:00
|
|
|
{
|
|
|
|
int rv;
|
2022-12-02 00:10:49 +00:00
|
|
|
uint8_t cause_value = OGS_GTP2_CAUSE_UNDEFINED_VALUE;
|
|
|
|
uint8_t session_cause = OGS_GTP2_CAUSE_UNDEFINED_VALUE;
|
2022-07-16 04:27:18 +00:00
|
|
|
int modify_action;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
sgwc_ue_t *sgwc_ue = NULL;
|
2022-07-16 04:27:18 +00:00
|
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
ogs_gtp_xact_t *s11_xact = NULL;
|
2022-07-16 04:27:18 +00:00
|
|
|
ogs_gtp2_modify_bearer_response_t *rsp = NULL;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
ogs_assert(message);
|
2022-07-16 04:27:18 +00:00
|
|
|
rsp = &message->modify_bearer_response;
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_assert(rsp);
|
|
|
|
|
2022-07-16 04:27:18 +00:00
|
|
|
ogs_debug("Modify Bearer Response");
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check Transaction
|
|
|
|
********************/
|
|
|
|
ogs_assert(s5c_xact);
|
|
|
|
s11_xact = s5c_xact->assoc_xact;
|
|
|
|
ogs_assert(s11_xact);
|
2022-07-16 04:27:18 +00:00
|
|
|
modify_action = s5c_xact->modify_action;
|
2022-04-29 12:28:16 +00:00
|
|
|
|
|
|
|
rv = ogs_gtp_xact_commit(s5c_xact);
|
|
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
|
2022-12-02 00:10:49 +00:00
|
|
|
/************************
|
|
|
|
* Getting Cause Value
|
|
|
|
************************/
|
|
|
|
if (rsp->cause.presence && rsp->cause.data) {
|
|
|
|
ogs_gtp2_cause_t *cause = rsp->cause.data;
|
|
|
|
ogs_assert(cause);
|
|
|
|
session_cause = cause->value;
|
|
|
|
}
|
|
|
|
|
2022-09-25 09:55:04 +00:00
|
|
|
/************************
|
|
|
|
* Check Session Context
|
|
|
|
*
|
|
|
|
* - Session could be deleted before a message is received from SMF.
|
|
|
|
************************/
|
|
|
|
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
|
|
|
|
|
|
|
|
if (!sess) {
|
2022-12-02 00:10:49 +00:00
|
|
|
ogs_error("No Context in TEID [Cause:%d]", session_cause);
|
2022-09-25 09:55:04 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
|
|
|
} else {
|
|
|
|
sgwc_ue = sess->sgwc_ue;
|
|
|
|
ogs_assert(sgwc_ue);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
|
|
|
if (modify_action == OGS_GTP_MODIFY_IN_PATH_SWITCH_REQUEST)
|
2024-03-25 23:04:26 +00:00
|
|
|
ogs_gtp_send_error_message(
|
|
|
|
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
|
|
|
|
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
|
2022-09-25 09:55:04 +00:00
|
|
|
else
|
2024-03-25 23:04:26 +00:00
|
|
|
ogs_gtp_send_error_message(
|
|
|
|
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
|
|
|
|
OGS_GTP2_MODIFY_BEARER_RESPONSE_TYPE, cause_value);
|
2022-09-25 09:55:04 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/*****************************************
|
|
|
|
* Check Mandatory/Conditional IE Missing
|
|
|
|
*****************************************/
|
2022-09-25 09:55:04 +00:00
|
|
|
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
if (rsp->cause.presence == 0) {
|
2022-12-02 00:10:49 +00:00
|
|
|
ogs_error("No Cause [VALUE:%d]", session_cause);
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
2022-07-16 04:27:18 +00:00
|
|
|
if (modify_action == OGS_GTP_MODIFY_IN_PATH_SWITCH_REQUEST)
|
2024-03-25 23:04:26 +00:00
|
|
|
ogs_gtp_send_error_message(
|
|
|
|
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
|
|
|
|
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, cause_value);
|
2022-07-16 04:27:18 +00:00
|
|
|
else
|
2024-03-25 23:04:26 +00:00
|
|
|
ogs_gtp_send_error_message(
|
|
|
|
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
|
|
|
|
OGS_GTP2_MODIFY_BEARER_RESPONSE_TYPE, cause_value);
|
2022-04-29 12:28:16 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/********************
|
|
|
|
* Check Cause Value
|
|
|
|
********************/
|
|
|
|
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
|
|
|
|
|
2022-12-02 00:10:49 +00:00
|
|
|
if (session_cause != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
|
|
|
ogs_error("GTP Cause [VALUE:%d]", session_cause);
|
2022-07-16 04:27:18 +00:00
|
|
|
if (modify_action == OGS_GTP_MODIFY_IN_PATH_SWITCH_REQUEST)
|
2024-03-25 23:04:26 +00:00
|
|
|
ogs_gtp_send_error_message(
|
|
|
|
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
|
|
|
|
OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE, session_cause);
|
2022-07-16 04:27:18 +00:00
|
|
|
else
|
2024-03-25 23:04:26 +00:00
|
|
|
ogs_gtp_send_error_message(
|
|
|
|
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
|
|
|
|
OGS_GTP2_MODIFY_BEARER_RESPONSE_TYPE, session_cause);
|
2022-04-29 12:28:16 +00:00
|
|
|
return;
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check ALL Context
|
|
|
|
********************/
|
2022-06-30 00:11:31 +00:00
|
|
|
ogs_assert(sgwc_ue);
|
2022-07-16 04:27:18 +00:00
|
|
|
ogs_assert(sess);
|
2022-04-29 12:28:16 +00:00
|
|
|
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
|
|
|
|
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
|
|
|
|
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
|
|
|
|
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
|
|
|
|
|
2022-07-16 04:27:18 +00:00
|
|
|
if (modify_action == OGS_GTP_MODIFY_IN_PATH_SWITCH_REQUEST) {
|
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgwc_gtp_send_create_session_response(sess, s11_xact));
|
|
|
|
} else {
|
|
|
|
message->h.type = OGS_GTP2_MODIFY_BEARER_RESPONSE_TYPE;
|
|
|
|
message->h.teid = sgwc_ue->mme_s11_teid;
|
|
|
|
|
|
|
|
pkbuf = ogs_gtp2_build_msg(message);
|
2023-01-23 15:01:36 +00:00
|
|
|
if (!pkbuf) {
|
|
|
|
ogs_error("ogs_gtp2_build_msg() failed");
|
|
|
|
return;
|
|
|
|
}
|
2022-07-16 04:27:18 +00:00
|
|
|
|
|
|
|
rv = ogs_gtp_xact_update_tx(s11_xact, &message->h, pkbuf);
|
2023-01-23 15:01:36 +00:00
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("ogs_gtp_xact_update_tx() failed");
|
|
|
|
return;
|
|
|
|
}
|
2022-07-16 04:27:18 +00:00
|
|
|
|
|
|
|
rv = ogs_gtp_xact_commit(s11_xact);
|
|
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
}
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
|
2022-07-16 04:27:18 +00:00
|
|
|
void sgwc_s5c_handle_delete_session_response(
|
2021-06-21 13:36:38 +00:00
|
|
|
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
|
2021-06-21 13:36:38 +00:00
|
|
|
{
|
|
|
|
int rv;
|
2022-12-02 00:10:49 +00:00
|
|
|
uint8_t cause_value = OGS_GTP2_CAUSE_UNDEFINED_VALUE;
|
|
|
|
uint8_t session_cause = OGS_GTP2_CAUSE_UNDEFINED_VALUE;
|
2021-06-21 13:36:38 +00:00
|
|
|
|
|
|
|
sgwc_ue_t *sgwc_ue = NULL;
|
|
|
|
|
|
|
|
ogs_gtp_xact_t *s11_xact = NULL;
|
2022-07-16 04:27:18 +00:00
|
|
|
ogs_gtp2_delete_session_response_t *rsp = NULL;
|
2021-06-21 13:36:38 +00:00
|
|
|
|
|
|
|
ogs_assert(message);
|
2022-07-16 04:27:18 +00:00
|
|
|
rsp = &message->delete_session_response;
|
2021-06-21 13:36:38 +00:00
|
|
|
ogs_assert(rsp);
|
|
|
|
|
2022-07-16 04:27:18 +00:00
|
|
|
ogs_debug("Delete Session Response");
|
2021-06-21 13:36:38 +00:00
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check Transaction
|
|
|
|
********************/
|
|
|
|
ogs_assert(s5c_xact);
|
|
|
|
s11_xact = s5c_xact->assoc_xact;
|
|
|
|
ogs_assert(s11_xact);
|
|
|
|
|
|
|
|
rv = ogs_gtp_xact_commit(s5c_xact);
|
|
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
|
2022-12-02 00:10:49 +00:00
|
|
|
/************************
|
|
|
|
* Getting Cause Value
|
|
|
|
************************/
|
|
|
|
if (rsp->cause.presence && rsp->cause.data) {
|
|
|
|
ogs_gtp2_cause_t *cause = rsp->cause.data;
|
|
|
|
ogs_assert(cause);
|
|
|
|
session_cause = cause->value;
|
|
|
|
}
|
|
|
|
|
2022-09-25 09:55:04 +00:00
|
|
|
/************************
|
|
|
|
* Check Session Context
|
|
|
|
*
|
|
|
|
* - Session could be deleted before a message is received from SMF.
|
|
|
|
************************/
|
|
|
|
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
|
|
|
|
|
|
|
|
if (!sess) {
|
2022-12-02 00:10:49 +00:00
|
|
|
ogs_error("No Context in TEID [Cause:%d]", session_cause);
|
2022-09-25 09:55:04 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
|
|
|
} else {
|
|
|
|
sgwc_ue = sess->sgwc_ue;
|
|
|
|
ogs_assert(sgwc_ue);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
2024-03-25 23:04:26 +00:00
|
|
|
ogs_gtp_send_error_message(
|
|
|
|
s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
|
2022-09-25 09:55:04 +00:00
|
|
|
OGS_GTP2_DELETE_SESSION_RESPONSE_TYPE, cause_value);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2022-10-25 12:22:14 +00:00
|
|
|
/********************
|
|
|
|
* Check Cause Value
|
|
|
|
********************/
|
2022-09-25 09:55:04 +00:00
|
|
|
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
|
2021-06-21 13:36:38 +00:00
|
|
|
|
2022-12-02 00:10:49 +00:00
|
|
|
if (rsp->cause.presence == 0) {
|
|
|
|
ogs_error("No Cause [VALUE:%d]", session_cause);
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
|
2021-06-21 13:36:38 +00:00
|
|
|
}
|
|
|
|
|
2022-12-02 00:10:49 +00:00
|
|
|
if (session_cause != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
|
|
|
ogs_error("GTP Cause [VALUE:%d] - Ignored", session_cause);
|
2022-04-29 12:28:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/********************
|
|
|
|
* Check ALL Context
|
|
|
|
********************/
|
2022-06-30 00:11:31 +00:00
|
|
|
ogs_assert(sess);
|
2022-07-16 04:27:18 +00:00
|
|
|
ogs_assert(sgwc_ue);
|
2022-04-29 12:28:16 +00:00
|
|
|
|
2022-07-16 04:27:18 +00:00
|
|
|
/* Remove a pgw session */
|
2021-06-21 13:36:38 +00:00
|
|
|
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
|
|
|
|
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
|
|
|
|
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
|
|
|
|
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
|
|
|
|
|
2022-07-16 04:27:18 +00:00
|
|
|
/*
|
|
|
|
* 1. MME sends Delete Session Request to SGW/SMF.
|
|
|
|
* 2. SMF sends Delete Session Response to SGW/MME.
|
|
|
|
*/
|
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgwc_pfcp_send_session_deletion_request(sess, s11_xact, gtpbuf));
|
2021-06-21 13:36:38 +00:00
|
|
|
}
|
|
|
|
|
2020-08-13 00:31:22 +00:00
|
|
|
void sgwc_s5c_handle_create_bearer_request(
|
|
|
|
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
|
2020-08-13 00:31:22 +00:00
|
|
|
{
|
|
|
|
int rv;
|
|
|
|
uint8_t cause_value = 0;
|
|
|
|
|
|
|
|
sgwc_ue_t *sgwc_ue = NULL;
|
|
|
|
sgwc_bearer_t *bearer = NULL;
|
|
|
|
sgwc_tunnel_t *ul_tunnel = NULL;
|
|
|
|
ogs_pfcp_far_t *far = NULL;
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_gtp2_create_bearer_request_t *req = NULL;
|
|
|
|
ogs_gtp2_f_teid_t *pgw_s5u_teid = NULL;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
ogs_assert(message);
|
|
|
|
req = &message->create_bearer_request;
|
|
|
|
ogs_assert(req);
|
|
|
|
|
|
|
|
ogs_debug("Create Bearer Request");
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check Transaction
|
|
|
|
********************/
|
|
|
|
ogs_assert(s5c_xact);
|
|
|
|
|
|
|
|
/************************
|
|
|
|
* Check Session Context
|
|
|
|
************************/
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
if (!sess) {
|
|
|
|
ogs_error("No Context in TEID");
|
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
|
|
|
} else {
|
|
|
|
sgwc_ue = sess->sgwc_ue;
|
|
|
|
ogs_assert(sgwc_ue);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
[PFCP/GTP] Incorrect TEI/SEID=0 (#3043)
If eg. PCRF or AAA diameter link is not yet ready (eg. PCRF crashed),
and a client sends a CreateSessionRequest announcing its ow F-TEID,
then open5gs-smfd answers with Create Session Response Cause="Remote peer not responding",
but it is not setting the received F-TEID in the header of the response,
instead it sends with TEID=0.
As a result, the peer cannot match the CreateSessionResponse,
and needs to rely on its own timeout timer to figure out
that specific request failed.
See 3GPP TS 29.274 5.5 Usage of the GTPv2-C Header:
```
Bit 4 represents a "T" flag, which indicates if TEID field is present in the GTP-C header or not. If the "T" flag is
set to 0, then the TEID field shall not be present in the GTP-C header. If the "T" flag is set to 1, then the TEID
field shall immediately follow the Length field, in octets 5 to 8. Apart from the Echo Request, Echo Response
and Version Not Supported Indication messages, in all EPC specific messages the value of the "T" flag shall be
set to "1".
```
This happens with Delete Session Requests and can happen with any PFCP message.
I've fixed TEID/SEID to send the value in the reponse message as is if it was received.
2024-04-05 12:36:30 +00:00
|
|
|
ogs_gtp_send_error_message(s5c_xact,
|
|
|
|
sess ? sess->pgw_s5c_teid : message->h.teid,
|
2022-04-29 12:28:16 +00:00
|
|
|
OGS_GTP2_CREATE_BEARER_RESPONSE_TYPE, cause_value);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************
|
|
|
|
* Check Mandatory/Conditional IE Missing
|
|
|
|
*****************************************/
|
|
|
|
ogs_assert(cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED);
|
|
|
|
|
2020-08-13 00:31:22 +00:00
|
|
|
if (req->linked_eps_bearer_id.presence == 0) {
|
|
|
|
ogs_error("No Linked EBI");
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
if (req->bearer_contexts.presence == 0) {
|
|
|
|
ogs_error("No Bearer");
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
if (req->bearer_contexts.eps_bearer_id.presence == 0) {
|
|
|
|
ogs_error("No EPS Bearer ID");
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
2021-10-26 06:26:10 +00:00
|
|
|
if (req->bearer_contexts.s4_u_sgsn_f_teid.presence == 0) {
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_error("No GTP TEID");
|
2022-04-29 12:28:16 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_CONDITIONAL_IE_MISSING;
|
2020-11-07 22:27:12 +00:00
|
|
|
}
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
[PFCP/GTP] Incorrect TEI/SEID=0 (#3043)
If eg. PCRF or AAA diameter link is not yet ready (eg. PCRF crashed),
and a client sends a CreateSessionRequest announcing its ow F-TEID,
then open5gs-smfd answers with Create Session Response Cause="Remote peer not responding",
but it is not setting the received F-TEID in the header of the response,
instead it sends with TEID=0.
As a result, the peer cannot match the CreateSessionResponse,
and needs to rely on its own timeout timer to figure out
that specific request failed.
See 3GPP TS 29.274 5.5 Usage of the GTPv2-C Header:
```
Bit 4 represents a "T" flag, which indicates if TEID field is present in the GTP-C header or not. If the "T" flag is
set to 0, then the TEID field shall not be present in the GTP-C header. If the "T" flag is set to 1, then the TEID
field shall immediately follow the Length field, in octets 5 to 8. Apart from the Echo Request, Echo Response
and Version Not Supported Indication messages, in all EPC specific messages the value of the "T" flag shall be
set to "1".
```
This happens with Delete Session Requests and can happen with any PFCP message.
I've fixed TEID/SEID to send the value in the reponse message as is if it was received.
2024-04-05 12:36:30 +00:00
|
|
|
ogs_gtp_send_error_message(s5c_xact,
|
|
|
|
sess ? sess->pgw_s5c_teid : message->h.teid,
|
2022-04-12 22:07:39 +00:00
|
|
|
OGS_GTP2_CREATE_BEARER_RESPONSE_TYPE, cause_value);
|
2020-08-13 00:31:22 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check ALL Context
|
|
|
|
********************/
|
|
|
|
ogs_assert(sess);
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_assert(sgwc_ue);
|
|
|
|
|
|
|
|
bearer = sgwc_bearer_add(sess);
|
|
|
|
ogs_assert(bearer);
|
|
|
|
ul_tunnel = sgwc_ul_tunnel_in_bearer(bearer);
|
|
|
|
ogs_assert(ul_tunnel);
|
|
|
|
|
|
|
|
/* Receive Data Plane(UL) : PGW-S5U */
|
2021-10-26 06:26:10 +00:00
|
|
|
pgw_s5u_teid = req->bearer_contexts.s4_u_sgsn_f_teid.data;
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_assert(pgw_s5u_teid);
|
|
|
|
ul_tunnel->remote_teid = be32toh(pgw_s5u_teid->teid);
|
|
|
|
|
|
|
|
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
|
|
|
|
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
|
|
|
|
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
|
|
|
|
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
|
|
|
|
ogs_debug(" SGW_S5U_TEID[%d] PGW_S5U_TEID[%d]",
|
|
|
|
ul_tunnel->local_teid, ul_tunnel->remote_teid);
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
rv = ogs_gtp2_f_teid_to_ip(pgw_s5u_teid, &ul_tunnel->remote_ip);
|
2020-08-13 00:31:22 +00:00
|
|
|
if (rv != OGS_OK) {
|
[PFCP/GTP] Incorrect TEI/SEID=0 (#3043)
If eg. PCRF or AAA diameter link is not yet ready (eg. PCRF crashed),
and a client sends a CreateSessionRequest announcing its ow F-TEID,
then open5gs-smfd answers with Create Session Response Cause="Remote peer not responding",
but it is not setting the received F-TEID in the header of the response,
instead it sends with TEID=0.
As a result, the peer cannot match the CreateSessionResponse,
and needs to rely on its own timeout timer to figure out
that specific request failed.
See 3GPP TS 29.274 5.5 Usage of the GTPv2-C Header:
```
Bit 4 represents a "T" flag, which indicates if TEID field is present in the GTP-C header or not. If the "T" flag is
set to 0, then the TEID field shall not be present in the GTP-C header. If the "T" flag is set to 1, then the TEID
field shall immediately follow the Length field, in octets 5 to 8. Apart from the Echo Request, Echo Response
and Version Not Supported Indication messages, in all EPC specific messages the value of the "T" flag shall be
set to "1".
```
This happens with Delete Session Requests and can happen with any PFCP message.
I've fixed TEID/SEID to send the value in the reponse message as is if it was received.
2024-04-05 12:36:30 +00:00
|
|
|
ogs_gtp_send_error_message(s5c_xact,
|
|
|
|
sess ? sess->pgw_s5c_teid : message->h.teid,
|
2022-04-12 22:07:39 +00:00
|
|
|
OGS_GTP2_CREATE_BEARER_RESPONSE_TYPE,
|
|
|
|
OGS_GTP2_CAUSE_MANDATORY_IE_MISSING);
|
2020-08-13 00:31:22 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
far = ul_tunnel->far;
|
|
|
|
ogs_assert(far);
|
|
|
|
|
2020-12-03 06:16:57 +00:00
|
|
|
far->apply_action = OGS_PFCP_APPLY_ACTION_FORW;
|
|
|
|
|
2021-06-06 13:35:46 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
ogs_pfcp_ip_to_outer_header_creation(&ul_tunnel->remote_ip,
|
|
|
|
&far->outer_header_creation, &far->outer_header_creation_len));
|
2020-08-13 00:31:22 +00:00
|
|
|
far->outer_header_creation.teid = ul_tunnel->remote_teid;
|
|
|
|
|
2021-05-16 03:22:10 +00:00
|
|
|
ogs_assert(OGS_OK ==
|
|
|
|
sgwc_pfcp_send_bearer_modification_request(
|
2020-08-13 00:31:22 +00:00
|
|
|
bearer, s5c_xact, gtpbuf,
|
2021-05-16 03:22:10 +00:00
|
|
|
OGS_PFCP_MODIFY_UL_ONLY|OGS_PFCP_MODIFY_CREATE));
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void sgwc_s5c_handle_update_bearer_request(
|
|
|
|
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
|
2020-08-13 00:31:22 +00:00
|
|
|
{
|
|
|
|
int rv;
|
|
|
|
uint8_t cause_value = 0;
|
|
|
|
ogs_gtp_xact_t *s11_xact = NULL;
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_gtp2_update_bearer_request_t *req = NULL;
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
|
|
sgwc_ue_t *sgwc_ue = NULL;
|
2020-11-07 22:27:12 +00:00
|
|
|
sgwc_bearer_t *bearer = NULL;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
ogs_assert(message);
|
|
|
|
req = &message->update_bearer_request;
|
|
|
|
ogs_assert(req);
|
|
|
|
|
|
|
|
ogs_debug("Update Bearer Request");
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check Transaction
|
|
|
|
********************/
|
|
|
|
ogs_assert(s5c_xact);
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/************************
|
|
|
|
* Check Session Context
|
|
|
|
************************/
|
|
|
|
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2020-11-07 22:27:12 +00:00
|
|
|
if (!sess) {
|
2022-04-29 12:28:16 +00:00
|
|
|
ogs_error("No Context in TEID");
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
2022-04-29 12:28:16 +00:00
|
|
|
} else {
|
|
|
|
sgwc_ue = sess->sgwc_ue;
|
|
|
|
ogs_assert(sgwc_ue);
|
|
|
|
|
|
|
|
if (req->bearer_contexts.presence == 0) {
|
|
|
|
ogs_error("No Bearer");
|
|
|
|
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
|
|
|
|
}
|
|
|
|
if (req->bearer_contexts.eps_bearer_id.presence == 0) {
|
|
|
|
ogs_error("No EPS Bearer ID");
|
|
|
|
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
|
|
|
|
}
|
2020-11-07 22:27:12 +00:00
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
|
|
|
bearer = sgwc_bearer_find_by_sess_ebi(sess,
|
2020-11-07 22:27:12 +00:00
|
|
|
req->bearer_contexts.eps_bearer_id.u8);
|
2022-04-29 12:28:16 +00:00
|
|
|
if (!bearer) {
|
|
|
|
ogs_error("No Context for EPS Bearer ID[%d]",
|
|
|
|
req->bearer_contexts.eps_bearer_id.u8);
|
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
|
|
|
}
|
|
|
|
}
|
2020-11-07 22:27:12 +00:00
|
|
|
}
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
[PFCP/GTP] Incorrect TEI/SEID=0 (#3043)
If eg. PCRF or AAA diameter link is not yet ready (eg. PCRF crashed),
and a client sends a CreateSessionRequest announcing its ow F-TEID,
then open5gs-smfd answers with Create Session Response Cause="Remote peer not responding",
but it is not setting the received F-TEID in the header of the response,
instead it sends with TEID=0.
As a result, the peer cannot match the CreateSessionResponse,
and needs to rely on its own timeout timer to figure out
that specific request failed.
See 3GPP TS 29.274 5.5 Usage of the GTPv2-C Header:
```
Bit 4 represents a "T" flag, which indicates if TEID field is present in the GTP-C header or not. If the "T" flag is
set to 0, then the TEID field shall not be present in the GTP-C header. If the "T" flag is set to 1, then the TEID
field shall immediately follow the Length field, in octets 5 to 8. Apart from the Echo Request, Echo Response
and Version Not Supported Indication messages, in all EPC specific messages the value of the "T" flag shall be
set to "1".
```
This happens with Delete Session Requests and can happen with any PFCP message.
I've fixed TEID/SEID to send the value in the reponse message as is if it was received.
2024-04-05 12:36:30 +00:00
|
|
|
ogs_gtp_send_error_message(s5c_xact,
|
|
|
|
sess ? sess->pgw_s5c_teid : message->h.teid,
|
2022-04-12 22:07:39 +00:00
|
|
|
OGS_GTP2_UPDATE_BEARER_RESPONSE_TYPE, cause_value);
|
2020-08-13 00:31:22 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check ALL Context
|
|
|
|
********************/
|
2020-11-07 22:27:12 +00:00
|
|
|
ogs_assert(sess);
|
|
|
|
ogs_assert(bearer);
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_assert(sgwc_ue);
|
2020-09-22 18:03:45 +00:00
|
|
|
ogs_assert(sgwc_ue->gnode);
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2020-11-07 22:27:12 +00:00
|
|
|
ogs_debug(" EBI[%d]", bearer->ebi);
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
|
|
|
|
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
|
|
|
|
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
|
|
|
|
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
message->h.type = OGS_GTP2_UPDATE_BEARER_REQUEST_TYPE;
|
2020-08-13 00:31:22 +00:00
|
|
|
message->h.teid = sgwc_ue->mme_s11_teid;
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
pkbuf = ogs_gtp2_build_msg(message);
|
2023-01-23 15:01:36 +00:00
|
|
|
if (!pkbuf) {
|
|
|
|
ogs_error("ogs_gtp2_build_msg() failed");
|
|
|
|
return;
|
|
|
|
}
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
s11_xact = s5c_xact->assoc_xact;
|
|
|
|
if (!s11_xact) {
|
|
|
|
s11_xact = ogs_gtp_xact_local_create(
|
2020-11-07 22:27:12 +00:00
|
|
|
sgwc_ue->gnode, &message->h, pkbuf, bearer_timeout, bearer);
|
2023-01-23 15:01:36 +00:00
|
|
|
if (!s11_xact) {
|
|
|
|
ogs_error("ogs_gtp_xact_local_create() failed");
|
|
|
|
return;
|
|
|
|
}
|
2022-10-25 12:22:14 +00:00
|
|
|
s11_xact->local_teid = sgwc_ue->sgw_s11_teid;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
ogs_gtp_xact_associate(s5c_xact, s11_xact);
|
|
|
|
} else {
|
|
|
|
rv = ogs_gtp_xact_update_tx(s11_xact, &message->h, pkbuf);
|
2023-01-23 15:01:36 +00:00
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("ogs_gtp_xact_update_tx() failed");
|
|
|
|
return;
|
|
|
|
}
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
2022-07-16 04:27:18 +00:00
|
|
|
s11_xact->local_teid = sgwc_ue->sgw_s11_teid;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
rv = ogs_gtp_xact_commit(s11_xact);
|
|
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
|
|
|
|
ogs_debug("Update Bearer Request : SGW <-- PGW");
|
|
|
|
}
|
|
|
|
|
|
|
|
void sgwc_s5c_handle_delete_bearer_request(
|
|
|
|
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
|
2020-08-13 00:31:22 +00:00
|
|
|
{
|
|
|
|
int rv;
|
|
|
|
uint8_t cause_value = 0;
|
|
|
|
ogs_gtp_xact_t *s11_xact = NULL;
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_gtp2_delete_bearer_request_t *req = NULL;
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_pkbuf_t *pkbuf = NULL;
|
|
|
|
sgwc_ue_t *sgwc_ue = NULL;
|
2020-11-07 22:27:12 +00:00
|
|
|
sgwc_bearer_t *bearer = NULL;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
ogs_assert(message);
|
|
|
|
req = &message->delete_bearer_request;
|
|
|
|
ogs_assert(req);
|
|
|
|
|
|
|
|
ogs_debug("Delete Bearer Request");
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check Transaction
|
|
|
|
********************/
|
|
|
|
ogs_assert(s5c_xact);
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/************************
|
|
|
|
* Check Session Context
|
|
|
|
************************/
|
|
|
|
cause_value = OGS_GTP2_CAUSE_REQUEST_ACCEPTED;
|
2020-11-07 22:27:12 +00:00
|
|
|
|
2020-08-13 00:31:22 +00:00
|
|
|
if (!sess) {
|
2022-04-29 12:28:16 +00:00
|
|
|
ogs_error("No Context in TEID");
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
2022-04-29 12:28:16 +00:00
|
|
|
} else {
|
|
|
|
sgwc_ue = sess->sgwc_ue;
|
|
|
|
ogs_assert(sgwc_ue);
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
if (req->linked_eps_bearer_id.presence == 0 &&
|
|
|
|
req->eps_bearer_ids.presence == 0) {
|
|
|
|
ogs_error("No Linked EBI or EPS Bearer ID");
|
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cause_value == OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
|
|
|
uint8_t ebi;
|
|
|
|
|
|
|
|
if (req->linked_eps_bearer_id.presence) {
|
|
|
|
/*
|
|
|
|
* << Linked EPS Bearer ID >>
|
|
|
|
*
|
|
|
|
* 1. SMF sends Delete Bearer Request(DEFAULT BEARER) to SGW/MME.
|
|
|
|
* 2. MME sends Delete Bearer Response to SGW/SMF.
|
|
|
|
*
|
|
|
|
* OR
|
|
|
|
*
|
|
|
|
* 1. SMF sends Delete Bearer Request(DEFAULT BEARER) to ePDG.
|
|
|
|
* 2. ePDG sends Delete Bearer Response(DEFAULT BEARER) to SMF.
|
|
|
|
*/
|
|
|
|
ebi = req->linked_eps_bearer_id.u8;
|
|
|
|
} else if (req->eps_bearer_ids.presence) {
|
|
|
|
/*
|
|
|
|
* << EPS Bearer IDs >>
|
|
|
|
*
|
|
|
|
* 1. MME sends Bearer Resource Command to SGW/SMF.
|
|
|
|
* 2. SMF sends Delete Bearer Request(DEDICATED BEARER)
|
|
|
|
* to SGW/MME.
|
|
|
|
* 3. MME sends Delete Bearer Response(DEDICATED BEARER)
|
|
|
|
* to SGW/SMF.
|
|
|
|
*
|
|
|
|
* OR
|
|
|
|
*
|
|
|
|
* 1. SMF sends Delete Bearer Request(DEDICATED BEARER)
|
|
|
|
* to SGW/MME.
|
|
|
|
* 2. MME sends Delete Bearer Response(DEDICATED BEARER)
|
|
|
|
* to SGW/SMF.
|
|
|
|
*/
|
|
|
|
ebi = req->eps_bearer_ids.u8;
|
|
|
|
} else
|
|
|
|
ogs_assert_if_reached();
|
|
|
|
|
|
|
|
bearer = sgwc_bearer_find_by_sess_ebi(sess, ebi);
|
|
|
|
if (!bearer) {
|
|
|
|
ogs_error("No Context for EPS Bearer ID[%d]", ebi);
|
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
|
|
|
}
|
|
|
|
}
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
if (cause_value != OGS_GTP2_CAUSE_REQUEST_ACCEPTED) {
|
[PFCP/GTP] Incorrect TEI/SEID=0 (#3043)
If eg. PCRF or AAA diameter link is not yet ready (eg. PCRF crashed),
and a client sends a CreateSessionRequest announcing its ow F-TEID,
then open5gs-smfd answers with Create Session Response Cause="Remote peer not responding",
but it is not setting the received F-TEID in the header of the response,
instead it sends with TEID=0.
As a result, the peer cannot match the CreateSessionResponse,
and needs to rely on its own timeout timer to figure out
that specific request failed.
See 3GPP TS 29.274 5.5 Usage of the GTPv2-C Header:
```
Bit 4 represents a "T" flag, which indicates if TEID field is present in the GTP-C header or not. If the "T" flag is
set to 0, then the TEID field shall not be present in the GTP-C header. If the "T" flag is set to 1, then the TEID
field shall immediately follow the Length field, in octets 5 to 8. Apart from the Echo Request, Echo Response
and Version Not Supported Indication messages, in all EPC specific messages the value of the "T" flag shall be
set to "1".
```
This happens with Delete Session Requests and can happen with any PFCP message.
I've fixed TEID/SEID to send the value in the reponse message as is if it was received.
2024-04-05 12:36:30 +00:00
|
|
|
ogs_gtp_send_error_message(s5c_xact,
|
|
|
|
sess ? sess->pgw_s5c_teid : message->h.teid,
|
2022-04-12 22:07:39 +00:00
|
|
|
OGS_GTP2_DELETE_BEARER_RESPONSE_TYPE, cause_value);
|
2020-08-13 00:31:22 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check ALL Context
|
|
|
|
********************/
|
2020-11-07 22:27:12 +00:00
|
|
|
ogs_assert(sess);
|
|
|
|
ogs_assert(bearer);
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_assert(sgwc_ue);
|
2020-09-22 18:03:45 +00:00
|
|
|
ogs_assert(sgwc_ue->gnode);
|
2020-08-13 00:31:22 +00:00
|
|
|
|
2020-11-07 22:27:12 +00:00
|
|
|
ogs_debug(" EBI[%d]", bearer->ebi);
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_debug(" MME_S11_TEID[%d] SGW_S11_TEID[%d]",
|
|
|
|
sgwc_ue->mme_s11_teid, sgwc_ue->sgw_s11_teid);
|
|
|
|
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
|
|
|
|
sess->sgw_s5c_teid, sess->pgw_s5c_teid);
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
message->h.type = OGS_GTP2_DELETE_BEARER_REQUEST_TYPE;
|
2020-08-13 00:31:22 +00:00
|
|
|
message->h.teid = sgwc_ue->mme_s11_teid;
|
|
|
|
|
2022-04-12 22:07:39 +00:00
|
|
|
pkbuf = ogs_gtp2_build_msg(message);
|
2023-01-23 15:01:36 +00:00
|
|
|
if (!pkbuf) {
|
|
|
|
ogs_error("ogs_gtp2_build_msg() failed");
|
|
|
|
return;
|
|
|
|
}
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
s11_xact = s5c_xact->assoc_xact;
|
|
|
|
if (!s11_xact) {
|
2021-06-21 13:36:38 +00:00
|
|
|
/*
|
|
|
|
* 1. SMF sends Delete Bearer Request(DEFAULT BEARER) to SGW/MME.
|
|
|
|
* 2. MME sends Delete Bearer Response to SGW/SMF.
|
|
|
|
*
|
|
|
|
* OR
|
|
|
|
*
|
|
|
|
* 1. SMF sends Delete Bearer Request(DEFAULT BEARER) to ePDG.
|
|
|
|
* 2. ePDG sends Delete Bearer Response(DEFAULT BEARER) to SMF.
|
|
|
|
*
|
|
|
|
* OR
|
|
|
|
*
|
|
|
|
* 1. SMF sends Delete Bearer Request(DEDICATED BEARER) to SGW/MME.
|
|
|
|
* 2. MME sends Delete Bearer Response(DEDICATED BEARER) to SGW/SMF.
|
|
|
|
*/
|
2020-08-13 00:31:22 +00:00
|
|
|
s11_xact = ogs_gtp_xact_local_create(
|
2020-11-07 22:27:12 +00:00
|
|
|
sgwc_ue->gnode, &message->h, pkbuf, bearer_timeout, bearer);
|
2023-01-23 15:01:36 +00:00
|
|
|
if (!s11_xact) {
|
|
|
|
ogs_error("ogs_gtp_xact_local_create() failed");
|
|
|
|
return;
|
|
|
|
}
|
2022-10-25 12:22:14 +00:00
|
|
|
s11_xact->local_teid = sgwc_ue->sgw_s11_teid;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
ogs_gtp_xact_associate(s5c_xact, s11_xact);
|
|
|
|
} else {
|
2021-06-21 13:36:38 +00:00
|
|
|
/*
|
|
|
|
* 1. MME sends Bearer Resource Command to SGW/SMF.
|
|
|
|
* 2. SMF sends Delete Bearer Request(DEDICATED BEARER) to SGW/MME.
|
|
|
|
* 3. MME sends Delete Bearer Response(DEDICATED BEARER) to SGW/SMF.
|
|
|
|
*/
|
2020-08-13 00:31:22 +00:00
|
|
|
rv = ogs_gtp_xact_update_tx(s11_xact, &message->h, pkbuf);
|
2023-01-23 15:01:36 +00:00
|
|
|
if (rv != OGS_OK) {
|
|
|
|
ogs_error("ogs_gtp_xact_update_tx() failed");
|
|
|
|
return;
|
|
|
|
}
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
2022-07-16 04:27:18 +00:00
|
|
|
s11_xact->local_teid = sgwc_ue->sgw_s11_teid;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
rv = ogs_gtp_xact_commit(s11_xact);
|
|
|
|
ogs_expect(rv == OGS_OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
void sgwc_s5c_handle_bearer_resource_failure_indication(
|
|
|
|
sgwc_sess_t *sess, ogs_gtp_xact_t *s5c_xact,
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_pkbuf_t *gtpbuf, ogs_gtp2_message_t *message)
|
2020-08-13 00:31:22 +00:00
|
|
|
{
|
|
|
|
uint8_t cause_value = 0;
|
|
|
|
ogs_gtp_xact_t *s11_xact = NULL;
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_gtp2_bearer_resource_failure_indication_t *ind = NULL;
|
2020-08-13 00:31:22 +00:00
|
|
|
|
|
|
|
sgwc_ue_t *sgwc_ue = NULL;
|
|
|
|
|
|
|
|
ogs_assert(message);
|
|
|
|
ind = &message->bearer_resource_failure_indication;
|
|
|
|
ogs_assert(ind);
|
|
|
|
|
|
|
|
ogs_debug("Bearer Resource Failure Indication");
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check Transaction
|
|
|
|
********************/
|
|
|
|
ogs_assert(s5c_xact);
|
|
|
|
s11_xact = s5c_xact->assoc_xact;
|
|
|
|
ogs_assert(s11_xact);
|
|
|
|
|
2022-09-25 09:55:04 +00:00
|
|
|
/************************
|
|
|
|
* Check Session Context
|
|
|
|
*
|
|
|
|
* - Session could be deleted before a message is received from SMF.
|
|
|
|
************************/
|
|
|
|
if (!sess) {
|
|
|
|
ogs_error("No Context in TEID");
|
|
|
|
cause_value = OGS_GTP2_CAUSE_CONTEXT_NOT_FOUND;
|
|
|
|
} else {
|
|
|
|
sgwc_ue = sess->sgwc_ue;
|
|
|
|
ogs_assert(sgwc_ue);
|
|
|
|
}
|
|
|
|
|
2022-04-29 12:28:16 +00:00
|
|
|
/********************
|
|
|
|
* Check Cause Value
|
|
|
|
********************/
|
2020-08-13 00:31:22 +00:00
|
|
|
if (ind->cause.presence) {
|
2022-04-12 22:07:39 +00:00
|
|
|
ogs_gtp2_cause_t *cause = ind->cause.data;
|
2020-08-13 00:31:22 +00:00
|
|
|
ogs_assert(cause);
|
|
|
|
|
|
|
|
cause_value = cause->value;
|
|
|
|
} else {
|
|
|
|
ogs_error("No Cause");
|
2022-04-12 22:07:39 +00:00
|
|
|
cause_value = OGS_GTP2_CAUSE_MANDATORY_IE_MISSING;
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|
|
|
|
|
2024-03-25 23:04:26 +00:00
|
|
|
ogs_gtp_send_error_message(s11_xact, sgwc_ue ? sgwc_ue->mme_s11_teid : 0,
|
2022-04-12 22:07:39 +00:00
|
|
|
OGS_GTP2_BEARER_RESOURCE_FAILURE_INDICATION_TYPE, cause_value);
|
2020-08-13 00:31:22 +00:00
|
|
|
}
|